Antenna



FIG. 1 is a perspective view from above of an antenna;

FIG. 2 is a perspective view from below thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a left side view thereof; and,

FIG. 8 is a right side view thereof.

The solid black shading in the drawings is used to indicate color contrast. 

The ornamental design for an antenna, as shown and described. 